Steel box composite beam bottomed platform

Abstract

The application discloses a steel box combined beam bottom platform, which comprises a framework, positioning columns, fender bars and steel hanging belts are welded on the upper surface of the framework respectively, two fender bars are arranged, middle plates and edge plates are arranged between the two fender bars, the middle plates can be spliced with the edge plates, the middle plates and the edge plates are inserted with the positioning columns, the upper ends of the steel hanging belts can be connected with the steel box combined bridge, guardrail assemblies are arranged on the fender bars, the guardrail assemblies comprise first node seats fixed on the upper surfaces of the fender bars, the steel box combined beam bottom platform is formed by welding the framework into a grid shape by using channel steel, the middle plates and the edge plates are densely laid, the framework and the beam bottom are welded by the steel hanging belts, and the bottom platform under the bridge is formed, so that workers can walk and work on the bottom platform under the condition of ensuring the clearance for the vehicles passing under the bridge, the structure is safe and reliable, the installation and removal are convenient, the whole platform is prepared in advance, and the steel box combined beam bottom platform has the advantages of light weight, convenient hoisting, rapid welding and the like.

Description

Technical Field

[0001] This invention relates to the field of bridge construction technology, specifically to a steel box girder bottom support platform. Background Technology

[0002] Steel box girder composite beams are a common structure used in municipal engineering span bridges. Most span bridges cross main urban roads with heavy traffic. When on-site construction conditions permit, steel box girder composite beams can be divided into longitudinal and transverse sections, temporary supports can be erected, and then the bridge can be welded together using a mobile crane for in-situ hoisting. The hoisting of temporary supports and steel beams requires traffic diversion at night when traffic is low, and the construction is carried out under full closure.

[0003] Meanwhile, during the welding, inspection, and painting operations across the line section after the steel beams are hoisted, traditional protective facilities use a shed structure, which requires steel pipe columns to be erected on the road construction foundation. The shed-type protective structure has a limited span due to material limitations, and the steel columns and foundations will affect road traffic flow and reduce road traffic efficiency. Therefore, we have proposed a steel box composite beam bottom support platform. Summary of the Invention

[0004] The purpose of this invention is to provide a steel box girder bottom support platform to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a steel box girder support platform, comprising a frame, wherein positioning columns, stop bars, and steel slings are welded to the upper surface of the frame, and two stop bars are provided, with a middle plate and an edge plate between the two stop bars. The middle plate can be spliced ​​with the edge plate, and both the middle plate and the edge plate are inserted into the positioning columns. The upper end of the steel slings can be connected to the steel box girder bridge. A guardrail assembly is provided on the stop bars, the guardrail assembly including a first node seat fixed to the upper surface of the stop bar, a transverse bar, and a second node seat fixed to the lower surface of the transverse bar. A vertical bar is provided between the first node seat and the second node seat, and the two ends of the vertical bar are rotatably connected to the first node seat and the second node seat, respectively. A connecting cylinder is provided at the end of the transverse bar, and a central shaft is rotatably provided inside the transverse bar. A protruding plate is fixedly installed on the inner wall of the transverse bar. An expansion plate is slidably installed inside the rod. A plug rod is fixedly installed on the lower surface of the expansion plate and can be inserted into the vertical rod. A first spring is provided between the protruding plate and the expansion plate. A short connecting rod is provided between the central shaft and the expansion plate. A bearing for rotatable connection with the transverse rod is provided on the side of the connecting cylinder. A fixing rod is fixedly installed inside the connecting cylinder and is fixedly connected to the central shaft. A limit assembly is provided on the side plate. The limit assembly includes a slide block and a ball joint rod slidably installed on the side plate. A connecting plate is fixedly installed on the body of the ball joint rod. A second spring is fixedly installed on the side of the connecting plate. The end of the ball joint rod can be inserted into the positioning post. A protrusion is fixedly installed on the side of the slide block. A third spring is fixedly installed on the side of the protrusion. A long connecting rod is also rotatably connected to the slide block. A pull rod is rotatably connected to the end of the long connecting rod away from the slide block.

[0006] Preferably, the middle plate has a T-shaped structure design, and the side plates are located on the sides of the middle plate.

[0007] Preferably, the frame is formed by welding multiple channel steels together, and the frame has a grid structure design.

[0008] Preferably, the side ends of the vertical rod and the stop bar adjacent to each other are designed at right angles, and the bottom surface of the vertical rod can contact the stop bar.

[0009] Preferably, the two ends of the first spring are fixedly connected to the convex plate and the expansion plate, respectively.

[0010] Preferably, the two ends of the short connecting rod are rotatably connected to the central shaft and the expansion plate, respectively.

[0011] Preferably, a protective cover is also fixedly installed on the side of the connecting cylinder, and the bearing is located in the cavity inside the protective cover.

[0012] Preferably, the end of the second spring is also fixedly connected to the side plate, and the end of the third spring is also fixedly connected to the side plate.

[0013] Preferably, the side plate has a groove with both ends closed, and the pull rod and the slide block are both located inside the groove.

[0014] Preferably, there is a gap between the pull rod and the side wall of the slide, and the corners of the slide are all rounded.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. In this invention, the frame is made of channel steel welded into a grid shape, and then anti-slip middle plate and edge plate are closely laid. The frame is welded to the bottom of the beam by steel slings to form a bottom platform under the bridge. Under the condition of ensuring the clearance for vehicles to pass under the bridge, workers can walk and work on the bottom platform. The structure is safe and reliable, and it is easy to install and dismantle. The entire platform is prefabricated and has the advantages of being lightweight, easy to hoist, and fast to weld.

[0017] 2. This invention improves the safety of the entire platform by adding guardrail components to the guardrails. At the same time, the guardrail components can be folded flexibly to enhance the practicality of the overall structure. In addition, limiting components are set on the side plates to strengthen the stability of the connection between the side plates and the frame, so as to provide workers with a stable working platform. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is an exploded view of the overall structure of the present invention;

[0020] Figure 3 This is an exploded view of the vertical rod structure of the present invention;

[0021] Figure 4 This is a cross-sectional schematic diagram of the transverse bar structure of the present invention;

[0022] Figure 5 This is an exploded view of the bearing structure of the present invention;

[0023] Figure 6 This is a side view of the connecting cylinder structure of the present invention;

[0024] Figure 7 This is a cross-sectional schematic diagram of the edge plate structure of the present invention;

[0025] Figure 8 This is an exploded view of the third spring structure of the present invention.

[0026] In the diagram: 1. Frame; 2. Positioning post; 3. Middle plate; 4. Side plate; 5. Stop bar; 6. Steel sling; 7. Guardrail assembly; 71. First node seat; 72. Vertical bar; 73. Horizontal bar; 74. Second node seat; 75. Connecting cylinder; 76. Insert rod; 77. Expansion plate; 78. First spring; 79. Protruding plate; 710. Central shaft; 711. Short connecting rod; 712. Bearing; 713. Protective cover; 714. Fixing rod; 8. Limiting assembly; 81. Pull rod; 82. Slide seat; 83. Protrusion; 84. Ball joint rod; 85. Second spring; 86. Connecting plate; 87. Long connecting rod; 88. Third spring. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Please see Figure 1-8 This invention provides a technical solution: a steel box girder bottom support platform, including a frame 1. The upper surface of the frame 1 is welded with positioning columns 2, stop bars 5, and steel slings 6. There are two stop bars 5. A middle plate 3 and an edge plate 4 are arranged between the two stop bars 5. The middle plate 3 can be spliced ​​with the edge plate 4, and both the middle plate 3 and the edge plate 4 are inserted into the positioning columns 2. The upper end of the steel slings 6 can be connected to the steel box girder bridge. The middle plate 3 has a T-shaped structure design, and the edge plate 4 is located on the side of the middle plate 3, so that the middle plate 3 and the edge plate 4 can overlap each other without gaps. The frame 1 is made of multiple channel steels welded together, and the frame 1 has a grid structure design.

[0029] A guardrail assembly 7 is provided on the stop bar 5. The guardrail assembly 7 includes a first node seat 71 fixed to the upper surface of the stop bar 5, a horizontal bar 73, and a second node seat 74 fixed to the lower surface of the horizontal bar 73. A vertical bar 72 is provided between the first node seat 71 and the second node seat 74. The two ends of the vertical bar 72 are rotatably connected to the first node seat 71 and the second node seat 74, respectively. A connecting cylinder 75 is provided at the end of the horizontal bar 73. A central shaft 710 is rotatably provided inside the horizontal bar 73, and a protruding plate 79 is fixedly installed on the inner wall of the horizontal bar 73. An expansion plate 77 is also slidably provided inside the horizontal bar 73. An insert rod 76 is fixedly installed on the lower surface of the expansion plate 77 and can be inserted into the vertical bar 72. A first spring 78 is provided between the protruding plate 79 and the expansion plate 77. A short connecting rod 711 is provided between the central shaft 710 and the expansion plate 77. A connecting cylinder 75 is provided on the side. A bearing 712 is provided for rotatably connecting with the horizontal bar 73. A fixing rod 714 is fixedly installed inside the connecting cylinder 75 and is fixedly connected to the central shaft 710. The side ends of the vertical bar 72 adjacent to the stop bar 5 are designed at right angles, and the bottom surface of the vertical bar 72 can contact the stop bar 5, which can limit the rotation angle of the vertical bar 72 and ensure the vertical state of the vertical bar 72 after rotation, so as to ensure the protective effect of the entire guardrail assembly 7, improve the safety of the overall device, and meet the actual application requirements. The two ends of the first spring 78 are fixedly connected to the convex plate 79 and the expansion plate 77 respectively. The two ends of the short connecting rod 711 are rotatably connected to the central shaft 710 and the expansion plate 77 respectively. A protective cover 713 is also fixedly installed on the side of the connecting cylinder 75. The bearing 712 is located in the cavity inside the protective cover 713. The protective cover 713 can prevent dust from entering the bearing 712 and ensure the flexibility of the bearing 712.

[0030] A limiting component 8 is provided on the side plate 4. The limiting component 8 includes a slide block 82 and a ball joint rod 84 slidably disposed on the side plate 4. A connecting plate 86 is fixedly installed on the body of the ball joint rod 84. A second spring 85 is fixedly installed on the side of the connecting plate 86. The end of the ball joint rod 84 can be inserted into the positioning post 2. A protrusion 83 is fixedly installed on the side of the slide block 82. A third spring 88 is fixedly installed on the side of the protrusion 83. A long connecting rod 87 is also rotatably connected to the slide block 82. A pull rod is rotatably connected to the end of the long connecting rod 87 away from the slide block 82. 81. The end of the second spring 85 is also fixedly connected to the side plate 4, and the end of the third spring 88 is also fixedly connected to the side plate 4. The side plate 4 has a groove with both ends closed. The pull rod 81 and the slide block 82 are both located inside the groove. There is a gap between the pull rod 81 and the side wall of the groove. The gap allows the worker to pick up the pull rod 81, which is convenient for actual operation. The corners of the slide block 82 are all rounded, which makes it easy for the slide block 82 to squeeze the ball head rod 84, so that the ball head rod 84 slides into the positioning post 2.

[0031] Working principle: The frame 1 is made of channel steel welded into a grid shape. Positioning posts 2 and stop bars 5 are then welded onto the frame 1. The middle plate 3 and side plates 4 are stacked on the frame 1 via the positioning posts 2 and stop bars 5 to form a bottom support platform. Then, using steel slings 6 welded to the frame 1, the entire bottom support platform is hoisted and fixed to the bottom of the bridge. At this point, workers can perform welding, inspection, and painting operations on the bridge's steel beams on this bottom support platform. To facilitate the dismantling of the bottom support platform, the limiting component 8 needs to be folded up. The connecting cylinder 75, which is rotatably connected to the transverse rod 73 via the bearing 712, rotates together with the central shaft 710, which is fixedly connected to the connecting cylinder 75 via the fixing rod 714, inside the transverse rod 73. The two ends of the short connecting rod 711 are rotatably connected to the central shaft 710 and the expansion plate 77, respectively. After the central shaft 710 rotates, it will pull the expansion plate 77 and the insert rod 76 fixed on the expansion plate 77 to slide upward, so that the insert rod 76 disengages from the interior of the vertical rod 72. Since the auxiliary shafts at both ends of the vertical rod 72 are rotatably connected to the second node seat 74 on the horizontal rod 73 and the first node seat 71 on the stop bar 5, the horizontal rod 73 can move after the insert rod 76 disengages from the interior of the vertical rod 72. By changing the angle of the vertical rod 72, the horizontal rod 73 can be folded up, reducing the volume of the entire limiting assembly 8, which facilitates subsequent disassembly. When it is necessary to restore the limiting assembly 8 to the protective state, the horizontal rod 711 is pushed back. 3. Because the lower end of the vertical rod 72 is designed at a right angle, excessive rotation of the vertical rod 72 can be avoided, keeping the vertical rod 72 in a vertical state. Furthermore, because the expansion plate 77 is further connected to the protruding plate 79 fixed inside the horizontal rod 73 by a first spring 78, the insertion rod 76 can be pushed into the vertical rod 72 by the elastic force of the first spring 78. This restricts the movement of the vertical rod 72 and locks its vertical state, ensuring the protective effect of the entire limiting assembly 8. Similarly, when changing the state of the side plate 4, pulling the pull rod 81 vertically upwards, connected by the long connecting rod 87 that is rotatably connected to the pull rod 81 and the slide block 82 at both ends, causes the slide block 82 to slide. At this time, the ball head... The rod 84 is no longer restricted because the connecting plate 86 fixed to the ball head rod 84 is connected by the second spring 85. Under the elastic force of the second spring 85, the ball head rod 84 slides away from the positioning post 2, and the ball head rod 84 disengages from the positioning post 2. At this time, the side plate 4 can be lifted by the pull rod 81 and removed. After the pull rod 81 is released, under the action of the third spring 88, which is fixed at both ends to the protrusion 83 on the slide block 82 and the side plate 4 respectively, the slide block 82 slides back, and the ball head end of the ball head rod 84 is squeezed. The other end of the ball head rod 84 can be inserted into the positioning post 2 again. At the same time, the pull rod 81 can be placed into the receiving groove on the side plate 4 to ensure the flatness of the upper surface of the side plate 4.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A steel box girder composite support platform, characterized in that: The frame includes a skeleton (1), on the upper surface of which positioning posts (2), baffles (5) and steel slings (6) are welded. There are two baffles (5), and a middle plate (3) and a side plate (4) are provided between the two baffles (5). The middle plate (3) can be spliced ​​with the side plate (4), and both the middle plate (3) and the side plate (4) are inserted into the positioning posts (2). The upper end of the steel slings (6) can be connected to the steel box composite bridge. A guardrail assembly (7) is provided on the stop bar (5). The guardrail assembly (7) includes a first node seat (71) fixed on the upper surface of the stop bar (5), a horizontal bar (73), and a second node seat (74) fixed on the lower surface of the horizontal bar (73). A vertical bar (72) is provided between the first node seat (71) and the second node seat (74). The two ends of the vertical bar (72) are rotatably connected to the first node seat (71) and the second node seat (74) respectively. A connecting cylinder (75) is provided at the end of the horizontal bar (73). A central shaft (710) is rotatably provided inside the horizontal bar (73), and a protrusion is fixedly installed on the inner wall of the horizontal bar (73). The plate (79) and the transverse rod (73) are also slidably provided with an expansion plate (77). The lower surface of the expansion plate (77) is fixedly installed with a plug rod (76). The plug rod (76) can be inserted into the vertical rod (72). A first spring (78) is provided between the convex plate (79) and the expansion plate (77). A short connecting rod (711) is provided between the central shaft (710) and the expansion plate (77). The side of the connecting cylinder (75) is provided with a bearing (712) for rotatably connecting with the transverse rod (73). A fixing rod (714) is fixedly installed inside the connecting cylinder (75). The fixing rod (714) is fixedly connected to the central shaft (710). A limiting component (8) is provided on the side plate (4). The limiting component (8) includes a slide block (82) and a ball joint rod (84) slidably disposed on the side plate (4). A connecting plate (86) is fixedly installed on the body of the ball joint rod (84). A second spring (85) is fixedly installed on the side of the connecting plate (86). The end of the ball joint rod (84) can be inserted into the positioning post (2). A protrusion (83) is fixedly installed on the side of the slide block (82). A third spring (88) is fixedly installed on the side of the protrusion (83). A long connecting rod (87) is also rotatably connected to the slide block (82). A pull rod (81) is rotatably connected to the end of the long connecting rod (87) away from the slide block (82).

2. The steel box girder bottom support platform according to claim 1, characterized in that: The middle plate (3) has a T-shaped structure design, and the side plate (4) is located on the side of the middle plate (3).

3. The steel box girder bottom support platform according to claim 1, characterized in that: The frame (1) is formed by welding multiple channel steels together, and the frame (1) has a grid structure design.

4. The steel box girder bottom support platform according to claim 1, characterized in that: The side ends of the vertical rod (72) and the stop bar (5) adjacent to each other are designed at right angles, and the bottom surface of the vertical rod (72) can contact the stop bar (5).

5. A steel box girder bottom support platform according to claim 1, characterized in that: The two ends of the first spring (78) are fixedly connected to the protruding plate (79) and the expansion plate (77), respectively.

6. The steel box girder composite support platform according to claim 1, characterized in that: The two ends of the short connecting rod (711) are rotatably connected to the central shaft (710) and the expansion plate (77), respectively.

7. The steel box girder composite support platform according to claim 1, characterized in that: A protective cover (713) is also fixedly installed on the side of the connecting cylinder (75), and the bearing (712) is located in the cavity inside the protective cover (713).

8. A steel box girder bottom support platform according to claim 1, characterized in that: The end of the second spring (85) is also fixedly connected to the side plate (4), and the end of the third spring (88) is also fixedly connected to the side plate (4).

9. A steel box girder bottom support platform according to claim 1, characterized in that: The side plate (4) has a groove with both ends closed, and the pull rod (81) and the slide block (82) are both located inside the groove.

10. A steel box girder bottom support platform according to claim 9, characterized in that: There is a gap between the pull rod (81) and the side wall of the slide groove, and the corners of the slide block (82) are all rounded.

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